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x - wiek Wojtka
x - 6 - wiek Jacka
(x +8 ) + ( x -6 +8) = 28
2x +10 = 28
2x = 18
x = 9
9 - 6 = 3
Odp. Wojtek ma obecnie 9 lat, a Jacek 3 lata.
20 - 6 = 14 - wiek Wojtka
20 - 14 = 6 - wiek Jacka
Odp. Jacek ma obecnie 6 lat a Wojtek 14.